[go: up one dir, main page]

CA2046949A1 - Process for preparing perfluoroalkoxysulphonic compounds - Google Patents

Process for preparing perfluoroalkoxysulphonic compounds

Info

Publication number
CA2046949A1
CA2046949A1 CA002046949A CA2046949A CA2046949A1 CA 2046949 A1 CA2046949 A1 CA 2046949A1 CA 002046949 A CA002046949 A CA 002046949A CA 2046949 A CA2046949 A CA 2046949A CA 2046949 A1 CA2046949 A1 CA 2046949A1
Authority
CA
Canada
Prior art keywords
formula
compounds
perfluoroalkoxysulphonic
preparing
iii
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002046949A
Other languages
French (fr)
Other versions
CA2046949C (en
Inventor
Walter Navarrini
Vittorio Montanari
Anna Maria Staccione
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Solvay Specialty Polymers Italy SpA
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2046949A1 publication Critical patent/CA2046949A1/en
Application granted granted Critical
Publication of CA2046949C publication Critical patent/CA2046949C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/02Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
    • B01J31/0215Sulfur-containing compounds
    • B01J31/0225Sulfur-containing compounds comprising sulfonic acid groups or the corresponding salts
    • B01J31/0227Sulfur-containing compounds comprising sulfonic acid groups or the corresponding salts being perfluorinated, i.e. comprising at least one perfluorinated moiety as substructure in case of polyfunctional compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D19/00Degasification of liquids
    • B01D19/02Foam dispersion or prevention
    • B01D19/04Foam dispersion or prevention by addition of chemical substances
    • B01D19/0404Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
    • B01D19/0427Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance compounds containing halogen-atoms
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/02Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
    • B01J31/0215Sulfur-containing compounds
    • B01J31/0222Sulfur-containing compounds comprising sulfonyl groups
    • B01J31/0224Sulfur-containing compounds comprising sulfonyl groups being perfluorinated, i.e. comprising at least one perfluorinated moiety as substructure in case of polyfunctional compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/02Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
    • B01J31/0215Sulfur-containing compounds
    • B01J31/0225Sulfur-containing compounds comprising sulfonic acid groups or the corresponding salts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/02Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
    • B01J31/0231Halogen-containing compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/02Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
    • B01J31/0234Nitrogen-, phosphorus-, arsenic- or antimony-containing compounds
    • B01J31/0235Nitrogen containing compounds
    • B01J31/0237Amines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/02Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
    • B01J31/0234Nitrogen-, phosphorus-, arsenic- or antimony-containing compounds
    • B01J31/0271Nitrogen-, phosphorus-, arsenic- or antimony-containing compounds also containing elements or functional groups covered by B01J31/0201 - B01J31/0231
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C303/00Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
    • C07C303/02Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof
    • C07C303/22Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof from sulfonic acids, by reactions not involving the formation of sulfo or halosulfonyl groups; from sulfonic halides by reactions not involving the formation of halosulfonyl groups
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C309/00Sulfonic acids; Halides, esters, or anhydrides thereof
    • C07C309/01Sulfonic acids
    • C07C309/02Sulfonic acids having sulfo groups bound to acyclic carbon atoms
    • C07C309/03Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
    • C07C309/07Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton containing oxygen atoms bound to the carbon skeleton
    • C07C309/09Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton containing oxygen atoms bound to the carbon skeleton containing etherified hydroxy groups bound to the carbon skeleton
    • C07C309/10Sulfonic acids having sulfo groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton containing oxygen atoms bound to the carbon skeleton containing etherified hydroxy groups bound to the carbon skeleton with the oxygen atom of at least one of the etherified hydroxy groups further bound to an acyclic carbon atom
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C309/00Sulfonic acids; Halides, esters, or anhydrides thereof
    • C07C309/78Halides of sulfonic acids
    • C07C309/79Halides of sulfonic acids having halosulfonyl groups bound to acyclic carbon atoms
    • C07C309/82Halides of sulfonic acids having halosulfonyl groups bound to acyclic carbon atoms of a carbon skeleton substituted by singly-bound oxygen atoms
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C311/00Amides of sulfonic acids, i.e. compounds having singly-bound oxygen atoms of sulfo groups replaced by nitrogen atoms, not being part of nitro or nitroso groups
    • C07C311/22Sulfonamides, the carbon skeleton of the acid part being further substituted by singly-bound oxygen atoms
    • C07C311/23Sulfonamides, the carbon skeleton of the acid part being further substituted by singly-bound oxygen atoms having the sulfur atoms of the sulfonamide groups bound to acyclic carbon atoms
    • C07C311/24Sulfonamides, the carbon skeleton of the acid part being further substituted by singly-bound oxygen atoms having the sulfur atoms of the sulfonamide groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/004Surface-active compounds containing F
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00Primary cells; Manufacture thereof
    • H01M6/14Cells with non-aqueous electrolyte
    • H01M6/16Cells with non-aqueous electrolyte with organic electrolyte
    • H01M6/162Cells with non-aqueous electrolyte with organic electrolyte characterised by the electrolyte
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2231/00Catalytic reactions performed with catalysts classified in B01J31/00
    • B01J2231/40Substitution reactions at carbon centres, e.g. C-C or C-X, i.e. carbon-hetero atom, cross-coupling, C-H activation or ring-opening reactions
    • B01J2231/42Catalytic cross-coupling, i.e. connection of previously not connected C-atoms or C- and X-atoms without rearrangement
    • B01J2231/4205C-C cross-coupling, e.g. metal catalyzed or Friedel-Crafts type
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00Primary cells; Manufacture thereof
    • H01M6/14Cells with non-aqueous electrolyte
    • H01M6/16Cells with non-aqueous electrolyte with organic electrolyte
    • H01M6/162Cells with non-aqueous electrolyte with organic electrolyte characterised by the electrolyte
    • H01M6/168Cells with non-aqueous electrolyte with organic electrolyte characterised by the electrolyte by additives

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Dispersion Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

A process for preparing perfluoroalkoxysulphonic compounds having formula:
R f ~ OC2F4 -SO2X)p (I) wherein R f represents a perfluoroalkyl or perfluoroethereal group, X represents F, OH or OM, in which M is an alkaline cation, alkaline-earth cation, or X represents NR1R2, in which R1 and R2, independently of each other, represent H or an alkyl group containing from 1 to 5 carbon atom and p is a number selected from 1 to 2, characterized in that the perfluoro vinyl sulphonyl fluoride of formula (II) CF2 = CF-SO2F is reacted with a hypofluorite of formula (III):
R f (OF) r (III) wherein R f is the same as defined above, and r represents 1 or 2, optionally in an inert solvent, at a temperature approximately ranging from -140°C to +40°C, and that, if so desired, from the compound of formula (I) so obtained in which X=F, the corresponding derivatives, in which X has the other meanings defined above, are obtained by means of conventional techniques. A few subclasses of compounds (I) are new per se.
The derivatives are utilized as polymerization catalysts, surfactants, electrolytes in electric generators.
CA002046949A 1990-07-12 1991-07-12 Process for preparing perfluoroalkoxysulphonic compounds Expired - Fee Related CA2046949C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT20920A/90 1990-07-12
IT02092090A IT1246357B (en) 1990-07-12 1990-07-12 PROCESS FOR THE PREPARATION OF PERFLUOROALCOXYSULPHONIC COMPOUNDS

Publications (2)

Publication Number Publication Date
CA2046949A1 true CA2046949A1 (en) 1992-01-13
CA2046949C CA2046949C (en) 2002-12-10

Family

ID=11174094

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002046949A Expired - Fee Related CA2046949C (en) 1990-07-12 1991-07-12 Process for preparing perfluoroalkoxysulphonic compounds

Country Status (6)

Country Link
US (2) US5241110A (en)
EP (1) EP0466483B1 (en)
JP (1) JP3167356B2 (en)
CA (1) CA2046949C (en)
DE (1) DE69113695T2 (en)
IT (1) IT1246357B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2704099B1 (en) * 1993-04-15 1995-07-07 Centre Nat Etd Spatiales ELECTROLYTE FOR ELECTRIC BATTERY.
US5358801A (en) * 1993-09-03 1994-10-25 Valence Technology, Inc. Solid electochemical cell of improved capacity and cycling capability having surfactant in vanadium oxide cathode mixture
FR2717620A1 (en) * 1994-03-21 1995-09-22 Centre Nat Rech Scient Additive limiting the corrosion of the collector in an electrochemical cell.
EP0699349B1 (en) * 1994-03-21 2007-10-10 Centre National De La Recherche Scientifique (Cnrs) Ionic conducting material having good anticorrosive properties
RU2125555C1 (en) * 1995-02-08 1999-01-27 Хальдор Топсеэ А/С Process for preparing fluorinated sulphonic acid
CA2704986C (en) * 1996-12-30 2013-04-09 Hydro-Quebec Use of an ionic compound, derived from malononitrile as a photoinitiator, radical initiators or catalyser in polymerization processes or as a basic dye
WO1999030381A1 (en) * 1997-12-10 1999-06-17 Minnesota Mining And Manufacturing Company Bis(perfluoroalkylsulfonyl)imide surfactant salts in electrochemical systems
IT1313597B1 (en) * 1999-08-04 2002-09-09 Ausimont Spa FLUOROPOLYEREOUS LUBRICANTS CONTAINING SULPHONYLFLUORIDE GROUPS
JP2001114750A (en) * 1999-10-19 2001-04-24 Daikin Ind Ltd Method for producing perfluorovinyl ether sulfonic acid derivative
ITMI20012744A1 (en) * 2001-12-21 2003-06-21 Ausimont Spa POLYMERIZATION PROCESS OF SULPHONIC MONOMERS
ITMI20020198A1 (en) 2002-02-05 2003-08-05 Ausimont Spa (PER) haloethers
US6624328B1 (en) * 2002-12-17 2003-09-23 3M Innovative Properties Company Preparation of perfluorinated vinyl ethers having a sulfonyl fluoride end-group
US7348088B2 (en) * 2002-12-19 2008-03-25 3M Innovative Properties Company Polymer electrolyte membrane
JP5558067B2 (en) * 2008-10-15 2014-07-23 三菱マテリアル株式会社 Method for producing perfluorosulfonic acid having an ether structure and derivatives thereof, and surfactant containing fluorine-containing ether sulfonic acid compound and derivatives thereof
JP2010095470A (en) * 2008-10-16 2010-04-30 Asahi Glass Co Ltd Method for producing fluorine-containing compound having fluorosulfonyl group
US7977426B2 (en) * 2008-11-13 2011-07-12 E. I. Du Pont De Nemours And Company Fluoroalkyl ether sulfonate surfactants
KR101431926B1 (en) * 2009-09-29 2014-08-19 미쓰비시 마테리알 가부시키가이샤 Method for producing perfluorosulfonic acid having ether structure and derivative thereof, and surfactant containing fluorine-containing ether sulfonic acid compound and derivative thereof
US10246572B2 (en) 2010-12-16 2019-04-02 Solvay Specialty Polymers Italy S.P.A. Foamable fluoropolymer compositions
EP2785781A1 (en) 2011-11-28 2014-10-08 Solvay Specialty Polymers USA, LLC. Polymer composition
DE102012101670A1 (en) * 2012-02-29 2013-08-29 Jacobs University Bremen Ggmbh Conducting salt for lithium-based energy storage

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1189561A (en) * 1967-02-21 1970-04-29 E I Du Pont De Neomours And Co Process for Preparing Fluorinated Organic Sulfonyl Derivatives and Sulfones
US3560568A (en) 1968-11-26 1971-02-02 Du Pont Preparation of sulfonic acid containing fluorocarbon vinyl ethers
US3821290A (en) 1971-03-01 1974-06-28 Allied Chem Polyfluoroisoalkoxyalkyl sulfonic acids
NL187439C (en) * 1976-08-06 1991-10-01 Montedison Spa PROCESS FOR PREPARING FLUORUS-CONTAINING COPOLYMERS, PROCESS FOR CROSS-CONNECTING COPOLYMERS, MEMBRANE FOR ELECTROLYSIS CELL AND METHOD FOR PREPARING FLUORORATED OLEGINS.
SU767182A1 (en) * 1978-12-22 1980-09-30 Ордена Ленина Институт Элементоорганических Соединений Ан Ссср Cutting fluid for mechanical working of metals
JPS5650947A (en) * 1979-09-26 1981-05-08 Du Pont Solution of perfluorinated polymer
US4348310A (en) 1979-09-26 1982-09-07 E. I. Du Pont De Nemours And Company Solutions of sulfonyl fluoride compounds and fluoropolymers
JPS56108738A (en) * 1979-12-31 1981-08-28 Du Pont Manufacture of toluic acid
US4356318A (en) 1980-08-04 1982-10-26 E. I. Du Pont De Nemours And Company Toluic acid
DE3043427A1 (en) * 1980-11-18 1982-07-08 Bayer Ag, 5090 Leverkusen PERFLUORED SULPHONIC ACID FLUORIDES AND METHOD FOR THE PRODUCTION THEREOF
JPS5834805A (en) * 1981-08-24 1983-03-01 Tokuyama Soda Co Ltd Method for producing a fluorine-containing compound having a carboxyl group
US4723016A (en) 1984-06-29 1988-02-02 E. I. Du Pont De Nemours And Company Preparation of anhydrous organic acid salts
IT1187674B (en) * 1985-05-17 1987-12-23 Montefluos Spa ETHI HALOGEN FLUOR AND PROCEDURE TO OBTAIN THEM
IT1223304B (en) * 1987-09-22 1990-09-19 Ausimont Spa PERFLOROPOLIETERI WITH TERMINAL MONO AND BIS HYPOFLUORITE AND PROCESS FOR THEIR PREPARATION
IT1218206B (en) * 1988-04-08 1990-04-12 Ausimont Spa USE OF PERFLUOROPOLYETER EMULSIONS FOR THE PROTECTION OF STONE MATERIALS FROM ATMOSPHERIC AGENTS

Also Published As

Publication number Publication date
IT1246357B (en) 1994-11-17
JP3167356B2 (en) 2001-05-21
EP0466483B1 (en) 1995-10-11
CA2046949C (en) 2002-12-10
DE69113695D1 (en) 1995-11-16
IT9020920A0 (en) 1990-07-12
JPH06128216A (en) 1994-05-10
IT9020920A1 (en) 1992-01-12
US5374770A (en) 1994-12-20
DE69113695T2 (en) 1996-05-15
US5241110A (en) 1993-08-31
EP0466483A1 (en) 1992-01-15

Similar Documents

Publication Publication Date Title
CA2046949A1 (en) Process for preparing perfluoroalkoxysulphonic compounds
EP0495073B1 (en) Li, mg and al- methide salts, formulations, electrolytes and batteries formed therefrom
AU545073B2 (en) Substituted fluoro carbon ethers
AU541096B2 (en) Fluorocarbon vinyl ethers and their polymers
CA2103298A1 (en) Novel carbonate compounds, non-aqueous electrolytic solutions and batteries comprising non-aqueous electrolytic solutions
IL122728A0 (en) Methods for the preparation of quaternary ammonium carbonate compounds quaternary ammonium carbonate compounds prepared thereby and wood preservative compositions containing the same
CA2368990A1 (en) Borate salts for use in electrochemical cells
CA2215993A1 (en) Method of producing fluoromethyl 1,1,1,3,3,3-hexafluoroisopropyl ether
EP0203577A3 (en) Novel fluoropolymer solutions
IE820831L (en) Preparation of fluoromethylpyridines
CA2070924A1 (en) Process for preparing fluorinated compound
US6642404B2 (en) Amines or salts thereof and methods of preparing same
EP3932904A1 (en) Silyl ether-containing sulfonate salt
RU2003112233A (en) METHOD FOR PRODUCING FLUORATED POLYVALENT CARBONYLIC COMPOUND
US4675453A (en) Process and intermediates for fluorinated vinyl ether monomer
US5068454A (en) Polyfluoroalkanoyl peroxide
PL222997A1 (en)
US5208339A (en) Nitrogen-containing perfluoroalkanoyl peroxide and method for production thereof
US4411841A (en) Preparation of novel perfluorinated sulphonic acid fluorides
US4590015A (en) Fluorinated polyether carboxylic acid fluorides
EP0736524A3 (en) Process for the synthesis of fluorinated alkyl sulphonyl halides
GB8330731D0 (en) Chemical compounds
JPS54112822A (en) Preparation of ester group-containing perfluorovinyl ether
JPS57146732A (en) Preparation of perfluoroalkyl-substituted keto compound
JPS57197234A (en) Preparation of perfluoroalkyl compound

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20090713